prepend text to autoresponder for some forms

<?php
// http://www.gravityhelp.com/forums/topic/add-text-to-specific-form-notification-emails
add_filter('gform_pre_submission_filter', 'brad_prepend_text');

function brad_prepend_text($form) {
    // array of form IDs where we want to modify the autoresponder. Use your form IDs here
    $form_ids = array (1,17,4,5);

    // if our form is not in the array, just return
    if (!in_array($form['id'], $form_ids)) {
        return $form;
    }

    // add your message to the beginning of the autoresponder
    $form['autoResponder']['message'] = '<p>Thank you for contacting WebDevStudios.  We love you!</p>' . $form['autoResponder']['message'];

    // return the modified form object
    return $form;
}